- added color float support for the OM OFF reader/writer

- added corresponding unittests
- small fix for the PLY writer

Note that for reading binary OFF files with color floats, the user has to set the flag, that floats are expected

closes #1410

git-svn-id: http://www.openmesh.org/svnrepo/OpenMesh/trunk@818 fdac6126-5c0c-442c-9429-916003d36597

src/OpenMesh/Core/IO/writer/PLYWriter.cc

@@ -245,6 +245,9 @@ write_ascii(std::ostream& _out, BaseExporter& _be, Options _opt) const
 
   write_header(_out, _be, _opt);
 
+  if (_opt.color_is_float())
+    _out << std::fixed;
+
   // vertex data (point, normals, colors, texcoords)
   for (i=0, nV=_be.n_vertices(); i<nV; ++i)
   {